演講資訊

摘要：

Among all of the interesting sciences associated with the galaxy clusters, dwarf galaxies provide us with a unique opportunity to probe the nature of the dark matter, because of their intrinsic large sample, their dark matter rich nature, and their apparent discrepancy with respect to the dark matter simulation, e.g. the missing-satellites problem. To assemble these faint samples, however, the contaminating effect from superposed galaxies is a serious issue. The effect is generally small for the bright galaxies, but it becomes increasingly larger for the fainter populations.

Here, the current status of the investigation of the faint galaxies inside a cluster, as well as the current issues related to the cluster membership, particularly for the faint-end, will be reviewed.